Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c3788506e858d96…

MALICIOUS

PDF

45.2 KB Created: 2021-05-11 18:07:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5526afa602acf7a776d60fa1f252f765 SHA-1: 0a33a6fb24b8884324a294beace644483c19f381 SHA-256: 7c3788506e858d96e5b742e91457c47741b41fd02adc6345001d8cc44cf54a23
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-free-coins-and-spins-link-today-game-hack PDF link annotation
    • http://dobrovodie.ru/images/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://dobrovodie.ru/images/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/www-robux-us_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/make-free-robux_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b56.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B56 24724 bytes
SHA-256: c29e2eb8e2a8aefa79607683ae986e0c60a33e552c7a7b454417f0a6e1cd9a64
font_01_sfnt_off00008427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8427 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC8 18412 bytes
SHA-256: 33825415dca9230cb3646c42e74ea5f1b776d8c47be8f6fdd7469cc236cf4eb1